1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 518 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.594 + 495 =
8. 8.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.495 + 594 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.396 + 693 =
19. 19.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
24. 24.693 + 396 =
25. 25.Take 735. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.297 + 792 =
30. 30.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.891 + 198 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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